OFFSET
0,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
EXAMPLE
2/2!*x^2 - 3/3!*x^3 + 4/4!*x^4 - 20/5!*x^5 ...
MATHEMATICA
Range[0, 30]! CoefficientList[Series[Tanh[ArcSinh[x] Log[x+1]], {x, 0, 30}], x] (* Vincenzo Librandi, Jul 20 2018 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
a(0) and a(1) inserted and title improved by Sean A. Irvine, Jul 19 2018
STATUS
approved